| EXHILARATORY | • exhilaratory adj. Causing exhilaration. • EXHILARATORY adj. serving to exhilarate. | 
| EXOTHERMICALLY | • exothermically adv. In an exothermic manner. • EXOTHERMIC adv. of a chemical reaction, giving out heat, also EXOTHERMAL. | 
| HETEROSEXUALITY | • heterosexuality n. The state of being sexually and romantically attracted primarily or exclusively to persons of the opposite sex. • heterosexuality n. Sexual activity with a person of the opposite sex. • HETEROSEXUALITY n. the state of being heterosexual. | 
| HYDROXYACETIC | • HYDROXYACETIC adj. as in hydroxyacetic acid, another name for glycolic acid. | 
| HYDROXYAPATITE | • hydroxyapatite n. A basic calcium phosphate mineral that is the principal inorganic constituent of bone and teeth. • HYDROXYAPATITE n. a complex phosphate of calcium that occurs as a mineral and is the chief structural element of vertebrate bone. | 
| HYDROXYAPATITES | • hydroxyapatites n. Plural of hydroxyapatite. • HYDROXYAPATITE n. a complex phosphate of calcium that occurs as a mineral and is the chief structural element of vertebrate bone. | 
| HYDROXYLAMINE | • hydroxylamine n. (Inorganic chemistry) An explosive inorganic derivative of ammonia, NH2OH, used as a reducing agent… • hydroxylamine n. (Organic chemistry) Any organic derivative of this compound. • HYDROXYLAMINE n. a colorless odorless nitrogenous base that resembles ammonia in its reactions. | 
| HYDROXYLAMINES | • hydroxylamines n. Plural of hydroxylamine. • HYDROXYLAMINE n. a colorless odorless nitrogenous base that resembles ammonia in its reactions. | 
| HYDROXYLAPATITE | • hydroxylapatite n. Alternative spelling of hydroxyapatite. • HYDROXYLAPATITE n. a mineral of the apatite group that is rare in the ground but is the principal inorganic constituent of tooth enamel and bone. | 
| HYPEROREXIA | • HYPEROREXIA n. compulsive overeating. | 
| HYPEROREXIAS | • HYPEROREXIA n. compulsive overeating. | 
| HYPERPROSEXIA | • hyperprosexia n. (Medicine, rare) Excessive attention; an abnormal state in which a person concentrates on one thing… • HYPERPROSEXIA n. abnormal powers of perception, as in Australian aboriginal trackers. | 
| HYPERPROSEXIAS | • HYPERPROSEXIA n. abnormal powers of perception, as in Australian aboriginal trackers. | 
| LEXICOGRAPHY | • lexicography n. (Uncountable) The art or craft of compiling, writing, and editing dictionaries. • lexicography n. (Uncountable, linguistics) The scholarly discipline of analysing and describing the semantic, syntagmatic… • lexicography n. (Countable) A dictionary, a lexicon, a wordbook. | 
| XENOMORPHICALLY | • XENOMORPHIC adv. having a form not its own. | 
| XEROGRAPHICALLY | • xerographically adv. In a xerographic way; by xerography. • XEROGRAPHIC adv. relating to xerography. | 
| XEROPHYTICALLY | • xerophytically adv. As a xerophyte. • XEROPHYTIC adv. able to withstand drought. | 
| XERORADIOGRAPHY | • xeroradiography n. A method of X-ray photography which uses an electrically charged metal plate instead of film. • XERORADIOGRAPHY n. radiography used esp. in mammographic screening for breast cancer that produces an image using X-rays in a manner similar to the way an image is produced by light in xerography. | 
| XYLOGRAPHIES | • xylographies n. Plural of xylography. • XYLOGRAPHY n. the art of making engravings on wood, esp. for printing. |